Check for Understanding Problem
Earlier, you were told about a toy rocket fired into the air from the top of a barn. Its height (h) above the ground in
yards after x seconds is given by the function:
h(x) = -5x + 10x + 20
What was the maximum height of the rocket?
Solution
The maximum height was reached by the rocket at one second as you found in part b from the previous example. To
find the maximum height, we would substitute in for x in our function and simplify.
The maximum height reached by the rocket was yards. What is the time it takes for the rocket to hit the ground?
(Use a graph or any other method to solve.)
It takes approximately
seconds for the rocket to hit the ground. (Round to the nearest tenth.)
Check